<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        title="注意：只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>
      <el-row class="el-rows">
        <el-col>
          <span
            >选择商品分类：
            <!-- v-model 双向绑定选中的id值 ，是一个数组-->
            <el-cascader
              v-model="cateKeys"
              :options="CaseList"
              expandTrigger="hover"
              :props="CateProps"
              @change="handleChange"
            ></el-cascader>
          </span>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            :disabled="isBtnDisable"
            type="primary"
            size="mini"
            @click="addParamsDialogVisible = true"
            >添加参数</el-button
          >
          <el-table :data="manyTableData" stripe border>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClosed(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                 <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index"> </el-table-column>
            <el-table-column prop="attr_name" label="分类名称">
            </el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showDialog(scope.row.attr_id)"
                  >操作</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParamsData(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            :disabled="isBtnDisable"
            type="primary"
            size="mini"
            @click="addParamsDialogVisible = true"
            >添加属性</el-button
          >
          <el-table :data="onlyTableData">
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClosed(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index"> </el-table-column>
            <el-table-column prop="attr_name" label="属性名称">
            </el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showDialog(scope.row.attr_id)"
                  >操作</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParamsData(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addParamsDialogVisible"
      width="50%"
      @close="addParamsDialogVisibleClosed"
    >
      <el-form
        :model="addParamsForm"
        :rules="addParamsFormRules"
        ref="addParamsFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addParamsForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addParamsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editParamsDialogVisible"
      width="50%"
      @close="editParamsDialogVisibleClosed"
    >
      <el-form
        :model="editParamsForm"
        :rules="editParamsFormRules"
        ref="editParamsFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editParamsForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editParamsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      CaseList: [],
      cateKeys: [],
      CateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      activeName: 'only',
      manyTableData: [],
      onlyTableData: [],
      addParamsDialogVisible: false,
      addParamsForm: {
        attr_name: ''
      },
      addParamsFormRules: {
        attr_name: {
          required: true,
          message: '请输入参数名称',
          trigger: 'blur'
        }
      },
      editParamsDialogVisible: false,
      editParamsForm: {},
      editParamsFormRules: {
        attr_name: {
          required: true,
          message: '请输入参数名称',
          trigger: 'blur'
        }
      }
    }
  },
  created() {
    this.getCaseList()
  },
  methods: {
    async getCaseList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('请求商品分类数据失败')
      }
      this.CaseList = res.data
      console.log(this.CaseList)
    },
    handleChange() {
      this.getData()
    },
    handleTabClick() {
      //   console.log(this.activeName)
      this.getData()
    },
    async getData() {
      if (this.cateKeys.length !== 3) {
        // 因为cateKeys与选择框有v-model双向数据绑定 所以将此处定义为空数组 那么将不会显示非三级分类
        this.cateKeys = []
        // 当选择的不是三级分类是 需要将下面已经出现的数据 清空
        this.manyTableData=[]
        this.onlyTableData=[]
        return
      }
      //   console.log(this.cateKeys)
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: {
            sel: this.activeName
          }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数失败')
      }

      res.data.forEach(item => {
        // item.attr_vals是否有内容 有转为数组 否则为空数组
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible=false
        item.inputValue=''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addParamsDialogVisibleClosed() {
      this.$refs.addParamsFormRef.resetFields()
    },
    addParams() {
      this.$refs.addParamsFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addParamsForm.attr_name,
            attr_sel: this.activeName
          }
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败')
        }
        this.$message.success('添加参数成功')
        this.getData()
        this.addParamsDialogVisible = false
      })
    },
    editParamsDialogVisibleClosed() {
      this.$refs.editParamsFormRef.resetFields()
    },
    async showDialog(id) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${id}`,
        {
          params: {
            attr_sel: this.activeName
          }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('查询参数失败')
      }
      this.editParamsForm = res.data
      this.editParamsDialogVisible = true
    },
    editParams() {
      this.$refs.editParamsFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editParamsForm.attr_id}`,
          {
            attr_name: this.editParamsForm.attr_name,
            attr_sel: this.activeName
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改参数成功')
        this.getData()
        this.editParamsDialogVisible = false
      })
    },
    async removeParamsData(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${id}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      this.getData()
    },
    async handleInputConfirm(row){{
      if(row.inputValue.trim().length===0){
        row.inputValue=''
        row.inputVisible=false
        return 
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue=''
      row.inputVisible=false
      const{data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
        attr_name:row.attr_name,
        attr_sel:row.attr_sel,
        attr_vals:row.attr_vals.join(' ')
      })
      if(res.meta.status!==200){
        return this.$message.error('添加失败')
      }
      this.$message.success('添加成功')
    }},
    showInput(row){
      row.inputVisible=true
      // $nextTick的作用是在也页面被重新渲染之后，才会回调里边的函数
       this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    async handleClosed(i,row){
      
      const{data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
        attr_name:row.attr_name,
        attr_sel:row.attr_sel,
        attr_vals:row.attr_vals.splice(i,1)
      })
      if(res.meta.status!==200){
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
    }
  },
  computed: {
    isBtnDisable() {
      if (this.cateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId() {
      if (this.cateKeys.length === 3) {
        return this.cateKeys[2]
      }
      return null
    },
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-rows {
  margin: 15px 0;
}
.el-tag {
  margin: 15px;
}
.input-new-tag{
  width: 120px;
}
</style>
